Petrol pump calibration

I know its done every 18 months, Mr google told me, but is there any indication on the pump itself to say when it was last done. I've never took much notice.

Apparently no one else takes notice of these things

You should fill up at 3am in the morning when its likely to be the coolest because petrol will shrink when its cold so you will get more, when I've filled up to the brim in the past it starts to squirt out if I take the filler cap off when its hotter

But how does joe blogs know when the pump was last calibrated

Are there certificates inside the kiosks?

And whilst you've got it on you, what about scales in shops?

I shall look when next I go, which wont be any time soon. I remember on numerous occasions when I put petrol in at one station

say £10 the meter always jumped to £10.01.

And it will happen more and more as the price of petrol rises

You're not quick enough